Device for detecting the focusing cylinder engagement torque

Abstract

This invention provides a detection device for the focusing tube engagement torque, including a mounting platform, a support assembly, a dynamic torque sensor, a drive assembly, and a clamping assembly. The support assembly consists of a corner bracket, a positioning plate, a motor bracket, reinforcing ribs, a sensor base, a silicone pad, and a bearing support. The drive assembly includes a stepper motor, a coupling, a thrust bearing, a rotating shaft, a cylindrical pin, and a sleeve. The clamping assembly consists of a lens barrel base, a hinge, a focusing tube locking seat, a focusing tube locking claw, and a locking screw. This invention can automate the lens barrel and focusing tube engagement process, ensuring uniform and adjustable speed; it can display torque values ​​and rotational speed in real time and output a torque curve.

Description

Technical Field

[0001] This utility model relates to the field of optical lens assembly and testing technology, and in particular to a device for detecting the torque of focusing tube engagement. Background Technology

[0002] During the assembly of a focusing lens module, it is necessary to test the torque between the focusing barrel and the lens barrel. In existing technology, a manual torque screwdriver is mainly used to verify the upper and lower limits of the focusing barrel torque value. This method cannot obtain a precise torque value, and the manual rotation speed is uneven, resulting in unstable test results, which affects the performance and quality of the final product. Summary of the Invention

[0003] To address the aforementioned issues, this invention discloses a detection device for the focusing cylinder's engagement torque, which helps to more accurately control the torque requirements of the focusing cylinder on-site, improve product quality and reliability, reduce rework costs caused by inaccurate testing, and assist product technicians in analyzing and addressing quality issues discovered during assembly.

[0004] A device for detecting the engagement torque of a focusing cylinder includes a mounting platform, a support assembly, a dynamic torque sensor, a drive assembly, and a clamping assembly;

[0005] The mounting platform consists of a mounting base and feet, with the feet installed under the mounting base.

[0006] The support assembly consists of an angle bracket, a positioning plate, a motor bracket, reinforcing ribs, a sensor base, a silicone pad, and a bearing support. The angle bracket is installed on the mounting base, the positioning plate is fixed on the angle bracket, the motor bracket is connected to the positioning plate through the reinforcing ribs, the dynamic torque sensor is placed on the bottom of the silicone pad, placed on the sensor base and fixed with screws, and then the sensor base is connected to the positioning plate, and the bearing support is fixed on the positioning plate.

[0007] The drive assembly includes a stepper motor, a coupling, a thrust bearing, a rotating shaft, a cylindrical pin, and a sleeve. The stepper motor is mounted on a motor bracket and connected to the input spindle of the dynamic torque sensor via a coupling. The output spindle is connected to the rotating shaft via a coupling. The thrust bearing is interference-fitted with the rotating shaft and mounted on a bearing support. The sleeve is clearance-fitted with the rotating shaft and transmits torque via the cylindrical pin.

[0008] The clamping assembly consists of a lens barrel base, a hinge, a focusing tube locking seat, a focusing tube locking claw, and a locking screw. The lens barrel base is mounted on the mounting base, the focusing tube locking seat is mounted on the sleeve, the focusing tube locking claw is connected to the focusing tube locking seat via the hinge, and the locking screw passes through the focusing tube locking claw and is installed on the focusing tube locking seat via a threaded connection.

[0009] The device also includes a control system for controlling the speed of the stepper motor and receiving torque curve data output by a dynamic torque sensor.

[0010] The working principle of this utility model is as follows:

[0011] The lower end of the focusing lens module is placed into the lens barrel base, aligned with the slot of the lens barrel base, restricting the relative rotation between the lens and the lens barrel base. The upper end is locked by the focusing tube locking assembly. After the device is started, the stepper motor provides torque, causing the sensor spindle, rotating shaft, sleeve, and focusing tube locking assembly to rotate, driving the lens barrel and focusing tube to perform a uniform rotational motion. The rotational speed and torque value generated during the rotational process are measured by the dynamic torque sensor, and the torque curve is output for analysis.

[0012] The beneficial effects of this utility model are:

[0013] 1. It can automate the process of screwing the lens barrel and focusing tube together, with uniform and adjustable speed;

[0014] 2. Simple to operate, with good stability and repeatability;

[0015] 3. It can display torque value and speed in real time and output torque curve. The torque value and speed can be displayed in real time on the display screen of the dynamic torque sensor. The sensor can transmit the torque value to the computer in real time through the force data curve acquisition card to draw the torque curve.

[0016] 4. The clamping fixtures can be changed to adapt to different products. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of this utility model.

[0018] List of reference numerals in the attached diagram:

[0019] 1-Mounting base; 2-Lens barrel base; 3-Focusing tube locking claw; 4-Locking screw; 5-Focusing tube locking seat; 6-Sleeve; 7-Cylindrical pin; 8-Rotating shaft; 9-Bearing support; 10-Thrust bearing; 11-Dynamic torque sensor; 12-Motor bracket; 13-Stepper motor; 14-Reinforcing rib; 15-Coupling; 16-Sensor base; 17-Silicone pad; 18-Positioning plate; 19-Hinge; 20-Angle seat; 21-Foot cup. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0021] like Figure 1 As shown, the detection device for the focusing cylinder engagement torque in this embodiment includes a mounting platform, a support assembly, a dynamic torque sensor, a drive assembly, and a clamping assembly; wherein the mounting platform is composed of a mounting base 1 and a foot cup 21 fixed to the bottom of the mounting base 1.

[0022] The support assembly includes a corner bracket 20 mounted on the mounting base 1, a positioning plate 18 fixed on the corner bracket 20, a motor bracket 12 connected to the positioning plate 18 via reinforcing ribs 14, a sensor base 16 and a bearing support 9 respectively mounted on the positioning plate 18; the bottom of the dynamic torque sensor 11 is provided with a silicone pad 17 and is fixed to the positioning plate 18 via the sensor base 16; the drive assembly includes a stepper motor 13 mounted on the motor bracket 12, a coupling 15 connected to the output shaft of the stepper motor 13, a rotating shaft 8 connected to the input end of the dynamic torque sensor 11, a thrust bearing 10 with an interference fit to the rotating shaft 8, a sleeve 6 with a clearance fit to the rotating shaft 8, and a cylindrical pin 7 for transmitting torque; the thrust bearing 10 is mounted on the bearing support 9 and is used to bear the axial load of the rotating shaft 8.

[0023] The stepper motor 13 is connected to the input end of the dynamic torque sensor 11 via a coupling 15, and the output end of the dynamic torque sensor 11 is connected to the rotating shaft 8 via another coupling 15; the sleeve 6 transmits torque to the rotating shaft 8 via a cylindrical pin 7.

[0024] The clamping assembly includes a lens barrel base 2 mounted on the mounting base 1, a focusing barrel locking seat 5 mounted on the sleeve 6, a focusing barrel locking claw 3 connected to the focusing barrel locking seat 5 via a hinge 19, and a locking screw 4 for locking; the locking screw 4 passes through the focusing barrel locking claw 3 and is mounted on the focusing barrel locking seat 5 via a threaded connection.

[0025] In this embodiment, the lower end of the focusing lens module is placed into the lens barrel base 2, and the upper end is locked by the focusing barrel locking claw 3. The stepper motor 13 is started, which drives the rotating shaft 8 and the sleeve 6 to rotate at a constant speed. The dynamic torque sensor 11 detects the torque and speed during the engagement process in real time and outputs the torque curve for analysis.

[0026] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A device for detecting the engagement torque of a focusing cylinder, characterized in that: The system includes a mounting platform, a support assembly, a dynamic torque sensor, a drive assembly, and a clamping assembly. The mounting platform consists of a mounting base (1) and foot cups (21) fixed to the bottom of the mounting base (1). The support assembly includes a corner bracket (20) mounted on the mounting base (1), a positioning plate (18) fixed on the corner bracket (20), a motor bracket (12) connected to the positioning plate (18) by reinforcing ribs (14), a sensor base (16) and a bearing support (9) respectively mounted on the positioning plate (18). The dynamic torque sensor (11) has a silicone pad (17) at its bottom and is fixed to the positioning plate (18) by the sensor base (16). The drive assembly includes a stepper motor (13) mounted on a motor bracket (12), a coupling (15) connected to the output shaft of the stepper motor (13), a rotating shaft (8) connected to the input end of a dynamic torque sensor (11), a thrust bearing (10) with an interference fit to the rotating shaft (8), a sleeve (6) with a clearance fit to the rotating shaft (8), and a cylindrical pin (7) for transmitting torque; the clamping assembly includes a lens barrel base (2) mounted on a mounting base (1), a focusing barrel locking seat (5) mounted on the sleeve (6), a focusing barrel locking claw (3) connected to the focusing barrel locking seat (5) via a hinge (19), and a locking screw (4) for locking.

2. The detection device for focusing cylinder engagement torque according to claim 1, characterized in that: The stepper motor (13) is connected to the input end of the dynamic torque sensor (11) via a coupling (15), and the output end of the dynamic torque sensor (11) is connected to the rotating shaft (8) via another coupling (15).

3. The detection device for the focusing cylinder engagement torque according to claim 1, characterized in that: The thrust bearing (10) is mounted on the bearing support (9) and is used to bear the axial load of the shaft (8).

4. The detection device for focusing cylinder engagement torque according to claim 1, characterized in that: The sleeve (6) and the rotating shaft (8) transmit torque through a cylindrical pin (7).

5. The detection device for focusing cylinder engagement torque according to claim 1, characterized in that: The locking screw (4) passes through the focusing cylinder locking claw (3) and is installed on the focusing cylinder locking seat (5) by threaded connection.

Images